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Precision Drawing: Creating Objects to Size and Location

Learn to draw objects with precision in Lesson 2. Understand UCS, graphing objects, and communication in CAD. Practice Absolute Cartesian, Relative Cartesian, and Relative Polar methods with examples. Discover the importance of different entry methods.

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Precision Drawing: Creating Objects to Size and Location

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  1. Drawing with Precision Lesson 2

  2. Now that you can draw objects…… • Let’s create them to a specific size and location. 4” DIA. 5”

  3. The UCS icon • User Coordinate System • x,y,z

  4. How objects are graphed. Y (-,+) (+,+) (-2,3) (4,1) X 0,0 (-,-) (+,-)

  5. How is this communicated to CAD? • At the command line.

  6. Variety is good! • Absolute Cartesian= x,y • Relative Cartesian = @x,y • Relative Polar = @x<degrees

  7. Three methods, one result. 9” line Absolute Cartesian Relative Cartesian Relative Polar Start point=2,2 End point=11,2 Start point=2,2 End point=@9,0 Start point=2,2 End point=@9<0

  8. Absolute Cartesian 1) 3,3 2) 11,3 3) 11,9 4) 3,9 1) 3,3 3 4 1 2 0,0

  9. Relative Cartesian (@) 1) 3,3 2) @8,0 3) @0,6 4) @-8,0 1) @0,-6 3 4 1 2 0,0

  10. Relative Polar (@) (<) 1) 3,3 2) @8<0 3) @6<90 4) @8<180 1) @6<270 3 4 1 2 0,0

  11. Aim and Fire! • Direct Entry Method. So why learn the other methods?

  12. Apply what you learned.

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